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Sequoia <br />f1w <br />Analytical <br />Gettler Ryan, Inc - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron 4 9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC <br />Result Limit Units Level Result %REC Limits RPD <br />Batch 0607014 - EPA 5030B [PIT] <br />Blank (OG07014-BLKI) Prepared & Analyzed 07 -Jul -00 <br />tart-Butvl alcohol ND 20 mg/m' Air <br />Methyl tert-butvi ether ND 050 <br />Di-isopropyi ether ND 050 " <br />Ethvi tert-butvi other ND 050 " <br />tert-Amvi methvi ether ND 050 <br />Surrogate DibromoJluoromethane <br />Surrogate 11-Dtchloroethane-d4 <br />US (OG07014-BSI) <br />Methyl tent -butyl ether <br />520 <br />470 <br />500 104 50-150 <br />Soo 940 50-150 <br />Prepared & Analyzed 07 -Jul -00 <br />466 0 50 mg/m' Air 500 932 70-130 <br />404 N Wiget lane <br />Walnut Geek, CA 94598 <br />(925) 988-9600 <br />FAX (925) 98&9673 <br />www sequoWabs corn <br />Reported <br />25 -Jul -00 10 44 <br />RPD <br />Lunt Notes <br />gate Dibromofluoromedu m <br />520 <br />500 104 50-150 <br />gate 1 1-Dtchlomethane-d4 <br />480 <br />500 96.0 50-150 <br />LCS Dup (OG07014-BSD1) <br />Prepared & Analyzed 07 -Jul -00 <br />Methyl Cert -butyl ether <br />499 <br />0 50 mWm' Au <br />500 996 70-130 664 25 <br />Surrogate DibromoJluoromed mte <br />530 <br />500 106 50-150 <br />Surrogate 12 Dichloroed ume-d4 <br />510 <br />500 102 50-150 <br />Batch 0647018 - EPA 5030D (PM <br />Blank (0007018-BLKI) <br />Prepared & Analyzed 06 -Jul -00 <br />Edwol <br />ND <br />500 ug4 <br />Cert -Butyl aioohol <br />ND <br />100 " <br />Methyl tort -butyl ether <br />ND <br />20 " <br />Dt-aopropyl ether <br />ND <br />20 " <br />Ethyl tert butyl ether <br />ND <br />20 " <br />test -Amyl methyl ether <br />ND <br />20 " <br />1.2-Dichloroethane <br />ND <br />20 " <br />Ethylene dibromtdc <br />ND <br />20 " <br />S—"are Dtbromofluorornrthmie <br />480 <br />500 960 50-150 <br />Suisvgate 12-Diehloroethane-d4 <br />430 <br />500 86.0 50.150 <br />LLOia Analytical - walnut Creek The results in dui report apply to the samples analysed in accordance with the chain of <br />custody document 77us analytical report must be reproduced in its entirety <br />Page 16 of 25 <br />Iw <br />